Rough Wall-Bounded Turbulence Over Unsteady Channel Flow Using Direct Numerical Simulations

dc.contributor.advisorBhaganagar, Kiran
dc.contributor.authorMitra, Pratik
dc.contributor.committeeMemberFeng, Zhi-Gang
dc.contributor.committeeMemberBasu, Debashis
dc.descriptionThis item is available only to currently enrolled UTSA students, faculty or staff. To download, navigate to Log In in the top right-hand corner of this screen, then select Log in with my UTSA ID.
dc.description.abstractDirect Numerical Simulations of unsteady channel flow has been performed over a regular rough surface. Flow has been initiated by applying an unsteady nonzero mean forcing in the form of a time-varying pressure gradient. The simulation of two different Reτ of 180 and 395 was performed and compared. Our aim is to investigate the difference in turbulence statistics of the smooth side with the rough side such as mean statistics, phase averaging of the unsteady channel wall. Further extending the findings of the streaks response for both the Reynolds number on the rough turbulent surface vicinity. The current simulation indicates the difference in a structure near the wall as the Reynolds number increase. Flow visualization has demonstrated differences due to roughness for the Reτ of 395 compared to Reτ of 180.
dc.description.departmentMechanical Engineering
dc.format.extent50 pages
dc.subjectDNS Turbulence Channel Flow
dc.subjectPulsatile flow High fidelity Simulation
dc.subjectTime-varying pressure gradient
dc.subject.classificationMechanical engineering
dc.subject.classificationFluid mechanics
dc.titleRough Wall-Bounded Turbulence Over Unsteady Channel Flow Using Direct Numerical Simulations
dcterms.accessRightspq_closed Engineering of Texas at San Antonio of Science


Original bundle

Now showing 1 - 1 of 1
No Thumbnail Available
13.55 MB
Adobe Portable Document Format